The configuration is from the 1994 Linear Applications Handbook by National Semiconductor. The circuit is valid for the LH0033 and others in the same family.
The sensor of this circuit can be any phototransistor and the SCR can be the TIC106. The circuit and...
This circuit is from a Radio Electronics from 1950. The transistor was still new and called a...
This circuit was found in a Linear Technology documentation from the 90's. The integrated circuits are...